To provide a domestic biological decomposition-type garbage treating machine by which the electric power requisite for heating is minimized even when the machine is used in winter or in a cold district, garbage is kept within an appropriate temperature range for the action of putrefying bacteria, and the putrefaction is effectively promoted.

The wall of the domestic biological decomposition-type garbage treating machine is highly heat-insulated, and the machine is covered with a black solar heat-absorbing cover such as a light-shielding net for horticulture. The covered machine is further set in a heat-insulating cover consisting of a frame and a transparent film and set in the southern direction to sufficiently receive direct solar radiation.